Started today (Version 59.0.3071.115 (Official Build) (64-bit)) - chrome won't clear old css when and actually shows the older versions as part of the css loaded. What event stranger is that it points to the same line-number.
Any idea - been searching around and did not come with anything so far.
Update: "disable cache" is marked, closing and opening did not help nor incognito tab or clearing all related data. + no service workers
Update 2: Happens in FF as well - CSS file looks fine
Update 3: The problem was in the concatenation process (of style files)